diff --git a/dtool/src/dconfig/notify.cxx b/dtool/src/dconfig/notify.cxx
index feaeff92b8..1396929ff6 100644
--- a/dtool/src/dconfig/notify.cxx
+++ b/dtool/src/dconfig/notify.cxx
@@ -466,7 +466,7 @@ config_initialized() {
 	nout << "Unable to open file " << notify_output << " for output.\n";
 	delete out;
       } else {
-	out->setf(ios::unitbuf, 0);
+	out->setf(ios::unitbuf);
 	set_ostream_ptr(out, true);
       }
     }